diff --git a/selftest/parallel.sh b/selftest/parallel.sh
index b59ea7c..0c18e23 100755
--- a/selftest/parallel.sh
+++ b/selftest/parallel.sh
@@ -29,5 +29,9 @@ export OPENSSL_CONF=/non-existing-file
 # We only do this if stdlib distutils actually exists
 $PYTHON -c 'import distutils' 2>/dev/null && export SETUPTOOLS_USE_DISTUTILS=stdlib || true
 
+# Python 3.12+ uses hypotheis in zoneinfo tests when available
+$PYTHON -m ensurepip --user
+$PYTHON -m pip install --user "hypothesis;python_version>='3.12'"
+
 $PYTHON -m test.pythoninfo
 $PYTHON -m test -wW -j$JOBS $X